C11 Chemical Reactions_11.4

When large amounts of carbon dioxide in the atmosphere dissolve in seawater, …… is formed.

• carbon monoxide

• carbonate

• carbonic acid

When seawater becomes more acidic over time, marine life are affected. Marine organisms are unable to form new shells and skeletons.

• True

• False

When seawater becomes more acidic over time, marine life are affected. Marine organisms are unable to form new shells and skeletons.

• True

• False

Marine organisms are unable to form new shells because

• carbonate compounds needed to form new shell react with acidic seawater.

• carbonic acid will cause more carbon dioxide gas to be released.

• the high pH damages their shell.

• new shell cannot be formed due to low amounts of carbon dioxide in water.

Rusting is an decomposition reaction.

• True

• False

Which of these is not a method to prevent rusting of iron beam?

• coat with paint

• coat with oil

• coat with water

• coat with a layer of zinc

What is the effect of carbon monoxide in air?

• irritate eyes

• causes acid rain

• cause headaches and eventually death

• cause damage to buildings

Deforestation does not lead to

• global warming.

• acidification of oceans.

• lesser greenhouse gas in atmosphere.

• reduce land area for farming.

All chemical reactions are harmful to humans.

• True

• False

Respiration is a chemical reaction because

• new products are formed.

• this is a reversible process.

• energy is released.